Oppo Reno 4: Unrecognized SIM card

You have just bought an Oppo Reno 4 and when you turn it on, it displays the following error message: SIM card not recognized. Oftentimes the Oppo Reno 4 does not recognize the SIM card and displays this message. In this circumstance, it is not necessarily necessary to bring the Oppo Reno 4 directly back. In truth, there are several tricks to solve this problem. We will therefore see in this content, what are the stuff to do and confirm to ensure that the SIM card is recognized on your Oppo Reno 4.unrecognized-sim-card-oppo-reno-4

What to do when ever the SIM card is not recognized on my Oppo Reno 4

In the event that the SIM card is not recognized on your Oppo Reno 4, below is a list of stuff that may help you determine the source of the problem, see repairing the problem.

Clean SIM card

One of the first stuff to do if the SIM card is not recognized on your Oppo Reno 4 is to clean it up. In truth, it may happen that dirt partially prevents the contact between the SIM card and the mobile phone. To clean it, pass a small dab of cloth over it and check if it is not damaged.

Check the location of the SIM card on your Oppo Reno 4

Oftentimes the problem may be caused by the location of the SIM card. In truth, it often occurs that small metal plugs that normally have to come in contact with the SIM card are a little bit relaxed. When this is the case, this prevents the Oppo Reno 4 from reading the SIM card. To solve this problem, you just simply have to thicken the SIM a little by gluing 1 or two pieces of tape at the back.

Test the SIM card on another smartphone

To find out if the problem comes from the SIM card, you can test it on another phone and you will have your answer. In case it is not recognized on other devices, you can change the SIM card.

Try another SIM card on your Oppo Reno 4

In the event that the two previous steps do not give anything, it is necessary to test another SIM card to find out if perhaps the problem comes from the card. In truth, if perhaps other SIM card work on the Oppo Reno 4, it is because the problem comes from the card. Otherwise, it is at the level of the smartphone that we will have to look.

Check that your Oppo Reno 4 is not Simlocker

In case you have tried several SIM cards on the Oppo Reno 4 and non-e are recognized, the smartphone may perhaps be Simlocker. This means that the Oppo Reno 4 will recognize just the SIM card of a specific operator. In this circumstance, you have to unlock it. You will find without a hassle a lot of offer on the internet that may do that.

Check that the problem doesn’t be caused by the ROM installed on the Oppo Reno 4

This part mainly concerns the people who root the Oppo Reno 4 to install a ROM that is not initial. In the event that this is actually what you have completed, be aware that the unrecognized SIM card problem is quite common after setting up fresh ROMs. We highly recommend that you reinstall an initial ROM and re-test it.

In the event that nothing works

In the event that all the above solutions do not work, we recommend you to bring your Oppo Reno 4 and the SIM card back to 1 of your operator’s shops.